Maths

Maths

For the past weeks (and in term two), the Tapawha math group have been learning how to multiply 2 digits by 2 digits.
These equations involve questions like:

1. 36x58
2. 28x88
3. 21x97
4. 11x39

I will answer one of these questions.
To succeed, you can either:

     A. Multiply the tens digit by the tens digit as it's value (e.g: 30x50 equals:____) and recieve that answer
     B. Multiply the tens digit by the tens digit as it's single value (e.g: 3x5 equals:____) and recieve that answer. But if you do take the path B, you must add the amount of zeros their are from the true whole vale of the number (3x5 equals 15. But because they were actually tens digits, you add 2 zeros, thus making the total answer 1500)

Then you leave that answer aside and the multiply the first tens digit by the second numbers ones. (e.g 30x8 equals 240)

You then multiply the first numbers ones by the second numbers ones. (e.g: 6x8 equals 48)
Finally you multiply the second numbers tens digit by first ones digit. (e.g: 6x50 equals 300. (Remember about the adding zeros rule from the tens...)

With your answers, you add them all together to make the true grand total:
300+48+1500+240 equals: 2088. So 36x58 is 2088.